Potassium Carbonate → (5R,9R)-tert-butyl 1-(9H-fluoren-9-yl)-9-(hexadecyloxy)-3-oxo-2,11-dioxa-7-thia-4-azaheptacosane-5-carboxylate

HRID 2407863Notes

Reaction equation

HRID 2407863 reaction equation
FC(F)(F)S(O[CH2:7][C@H:8]([O:27][CH2:28][CH2:29][CH2:30][CH2:31][CH2:32][CH2:33][CH2:34][CH2:35][CH2:36][CH2:37][CH2:38][CH2:39][CH2:40][CH2:41][CH2:42][CH3:43])[CH2:9][O:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][CH2:20][CH2:21][CH2:22][CH2:23][CH2:24][CH2:25][CH3:26])(=O)=O.[CH:46]1[C:58]2[CH:57]([CH2:59][O:60][C:61]([NH:63][C@@H:64]([CH2:72][SH:73])[C:65]([O:67][C:68]([CH3:71])([CH3:70])[CH3:69])=[O:66])=[O:62])[C:56]3[C:51](=[CH:52][CH:53]=[CH:54][CH:55]=3)[C:50]=2[CH:49]=[CH:48][CH:47]=1.C([O-])([O-])=O.[K+].[K+]>CCO>[CH:55]1[C:56]2[CH:57]([CH2:59][O:60][C:61](=[O:62])[NH:63][C@H:64]([C:65]([O:67][C:68]([CH3:70])([CH3:69])[CH3:71])=[O:66])[CH2:72][S:73][CH2:7][C@H:8]([O:27][CH2:28][CH2:29][CH2:30][CH2:31][CH2:32][CH2:33][CH2:34][CH2:35][CH2:36][CH2:37][CH2:38][CH2:39][CH2:40][CH2:41][CH2:42][CH3:43])[CH2:9][O:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][CH2:20][CH2:21][CH2:22][CH2:23][CH2:24][CH2:25][CH3:26])[C:58]3[C:50](=[CH:49][CH:48]=[CH:47][CH:46]=3)[C:51]=2[CH:52]=[CH:53][CH:54]=1

Participants

5

Reactant 3

HCID 11430Potassium CarbonateHCID 11440950(R)-tert-Butyl 2-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-3-mercaptopropanoateHCID 86678269(R)-2,3-bis(hexadecyloxy)propyl trifluoromethanesulfonate

Product 1

HCID 86678268(5R,9R)-tert-butyl 1-(9H-fluoren-9-yl)-9-(hexadecyloxy)-3-oxo-2,11-dioxa-7-thia-4-azaheptacosane-5-carboxylate

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Conditions

Temperature
60 °C

Procedure

A mixture of (R)-2,3-bis(hexadecyloxy)propyl trifluoromethanesulfonate (1 eq), (R)-tert-butyl 2-(((9H-fluoren-9-yl)methoxy)carbonylamino)-3-mercaptopropanoate (8, 2 eq) and K2CO3 (1 eq) in EtOH (0.1 M) was stirred for 30 minutes at 60° C. The reaction mixture was filtered and washed with DCM. The filtrate was concentrated en vaccuo. The resulting crude was purified by flash chromatography on a COMBIFLASH® system (ISCO) using 0-20% EtOAc/Hex to give (5R,9R)-tert-butyl 1-(9H-fluoren-9-yl)-9-(hexadecyloxy)-3-oxo-2,11-dioxa-7-thia-4-azaheptacosane-5-carboxylate as a colorless oil.

Workup

  1. filtrationThe reaction mixture was filtered
  2. washwashed with DCM
  3. concentrationThe filtrate was concentrated en vaccuo
  4. customThe resulting crude was purified by flash chromatography on a COMBIFLASH® system (ISCO)

Sources & evidence

ORD record
ord-1811859e7321414eb2e273ab3fe56e75
Source dataset
uspto-grants-2014_08
Patent number
US08808703B2

Reaction notes

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